B1 could refer to:
Canon[]
- B1 (Colossus), a battle droid who was sold to Kragan Gorr and worked with Neeku Vozo of the Colossus
- B1-series battle droid, the main infantry of the Trade Federation Droid Army and Separatist Droid Army
Legends[]
- B1-series worker droid, a labor droid built by AccuTronics
- B1-Series battle droid, the primary soldiers of the Trade Federation and Separatist Droid Armies
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